m3 2002 thru 2006 diffrents

im looking to buy m3 smg and was wondering what was changed btw years as of exterior, interior and performance....
i almost got 2004 smg but somebody was quicker and i found excatly same model but from 2003....i can say the led lights in the back no heated seats but thats it....
is there any difrents on smg ???? in this car thru 2002-06 was it changed at all

Nope, only changes were the LED taillights in mid -03. Various option package changed and some color choice changes.

And some audio (AUX in and Sirius capable).

Engine and tranny are the same across the board.

http://m3.madrussian.net/modelchanges.shtml